I agree, angels are still very popular and I think they're beautiful too. Hope you find some soon but I wouldn't get more than 1 or maybe 2 just because they're tendency to be so territorial.
Years ago, I kept a single three spot gourami in a 39g community aquarium with 2 angels for years and never had any issues. The gourami was the shyest of the bunch and was larger than the angels at first, which I think helped. However that was my only experience with gouramis so I'd go with what ameliaaahx said ;).
I currently have 2 small angels in my 29g (they were about nickel-sized when I got them, including fins, but they are growing at a good pace). They still get along great but I'm crossing my fingers that I won't have to rehome one any time soon, as I soon plan on setting up a much larger tank to move them to once they outgrow the 29g. :)
29 gal community
sunset and golden sailfin mollies (14-15 fry born 6/12/13)
marbled and black angels
5 furbabies: miniature dachshund, golden retriever, mutt, and 2 cats :)
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